/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "i2c.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h> 
#include <stdio.h> 
#include "oled.h"
#include "oledfont.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint8_t receiveData[100];
extern TIM_HandleTypeDef htim2;
uint32_t pwmDuty = 0;
int8_t breathDirection = 1; 
uint32_t breathSpeed = 5; 
uint8_t cmd_ready = 0;

uint8_t oled_pos = 0;
uint32_t last_anim_time = 0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void Breath_LED_Task(void);
void Set_Breath_Speed(uint32_t speed);
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size);
void Parse_Command(uint8_t *data, uint16_t size);

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* 串口发送欢迎函数 */
void Send_Welcome_Message(void){
		char welcome[] = "\r\n==================================\r\n"
												"Breath LED Control System\r\n"
												"Commands: SPEED:1-50\r\n"
												"Current: SPEED:5\r\n"
												"(Please enter in the format\r\n"
												"`SPEED:desired speed`\r\n"
												"to adjust the speed.)\r\n"
												"==================================\r\n";
		 HAL_UART_Transmit(&huart1, (uint8_t*)welcome, strlen(welcome), 100);
}

/* 呼吸灯任务函数 */
void Breath_LED_Task(void)
{
    static uint32_t last_time = 0;
    uint32_t current_time = HAL_GetTick();
    
    // 每10ms更新一次PWM
    if(current_time - last_time >= 10) {
        last_time = current_time;
        
    // 更新PWM占空比		
		/*使用max_step和min_step解决了边界溢出导致程序崩溃的问题*/
    if(breathDirection == 1) {
				uint32_t max_step = 1000 - pwmDuty;
				if(breathSpeed > max_step){
						pwmDuty = 1000;
						breathDirection = -1;
				}
				else{
						pwmDuty += breathSpeed;
				}
    } 
		else {
				uint32_t min_step = pwmDuty;
				if(breathSpeed > min_step){
						pwmDuty = 0;
						breathDirection = 1;
				}
				else{
						pwmDuty -= breathSpeed;
				}
    }
        
        // 设置PWM占空比 (PA0 - TIM2_CH1)
        __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, pwmDuty);
    }
}

/* 修改呼吸速度函数 */
void Set_Breath_Speed(uint32_t speed)
{
    if(speed >= 1 && speed <= 50) {
        breathSpeed = speed;
    }
}

/* 重新定义回调函数 使用DMA */
void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
		if(huart == &huart1){
				cmd_ready = 1;	// 收到命令的标志
				HAL_UART_Transmit_DMA(&huart1, receiveData, Size);	// 回显接收到的数据
				HAL_UARTEx_ReceiveToIdle_DMA(&huart1, receiveData, sizeof(receiveData));	// 重新启动DMA接收
				__HAL_DMA_DISABLE_IT(&hdma_usart1_rx,DMA_IT_HT);	// 关闭DMA传输过半中断
		}
}

/* 命令解析函数 */
void Parse_Command(uint8_t *data, uint16_t size)
{
    char cmd[32];
    int speed;
    
    // 复制数据到临时缓冲区并添加结束符
    if(size > sizeof(cmd)-1) size = sizeof(cmd)-1;
    memcpy(cmd, data, size);
    cmd[size] = '\0';
    
    // 解析 "SPEED:数字" 命令
    if(sscanf(cmd, "SPEED:%d", &speed) == 1) {
        Set_Breath_Speed(speed);
    }
}


/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
		

		
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */
	
  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_DMA_Init();
  MX_USART1_UART_Init();
  MX_I2C1_Init();
  /* USER CODE BEGIN 2 */
	HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
	__HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, 0);
	HAL_UARTEx_ReceiveToIdle_DMA(&huart1, receiveData, sizeof(receiveData));
	__HAL_DMA_DISABLE_IT(&hdma_usart1_rx,DMA_IT_HT);//关闭DMA传输过半中断
	Send_Welcome_Message();

	HAL_Delay(20);
	OLED_Init(); 
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
/* 功能：呼吸灯 */
		HAL_Delay(1); // 短暂延时
		// 执行呼吸灯任务
    Breath_LED_Task();
		
/* 功能：串口不定长发送修改呼吸灯呼吸速度 */
		// 检查并处理串口命令
    if(cmd_ready) {
        cmd_ready = 0;	// 清除标志
        Parse_Command(receiveData, sizeof(receiveData));	// 解析命令 改变呼吸灯频率
		 }
		
/* 功能：i2c通信驱动oled实现画面移动 */
		// 使用非阻塞动画来解除oled模块对呼吸灯模块的影响（每30ms更新一帧OLED动画）
		if(HAL_GetTick() - last_anim_time > 30) {
        last_anim_time = HAL_GetTick();
        OLED_NewFrame();
        OLED_DrawImage(0+2*oled_pos,0,&birdImg,OLED_COLOR_NORMAL);
        OLED_DrawImage(56+2*oled_pos,0,&birdImg,OLED_COLOR_NORMAL);
				OLED_DrawImage(112+2*oled_pos,0,&birdImg,OLED_COLOR_NORMAL); // 显示三只鸟
				OLED_PrintString(128-2*oled_pos, 20, "江俊成", &font16x16, OLED_COLOR_NORMAL); // 显示名字
        OLED_ShowFrame();
        oled_pos++; // 实现文字图像移动
        if(oled_pos > 128) oled_pos = 0;
    }

    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
